Radial flow magnetic filter with radially directed magnetic flux



y 1961 SABURO MIYATA MORIYA 2,993,601

RADIAL FLOW MAGNETIC FILTER WITH RADIALLY DIRECTED MAGNETIC FLUX FiledMay 19, 1958 zw z w INVENTOR.

United States Patent 2,993,601 RADIAL FLOW MAGNETIC FILTER WITH RA-DIALLY DIRECTED MAGNETIC FLUX Saburo Miyata Moriya, 1960 Tomioka MachiKanazawa Ku, Yokohama, Japan Filed May 19, 1958, Ser. No. 736,353 6Claims. (Cl. 210-223) This invention relates to a radial flow magneticfilter with radially directed magnetic flux. More particularly theinvention relates to a filter and/or water conditioner wherein the flowof fluid to be purified, or treated is radially inward from the exteriortoward the axis of the filter, through a magnetic flux which is radial.

An object of this invention is the provision, in a radial flow filter,of an area under the influence of magnetic flux for removal offerro-magnetic particles.

Another object of this invention is the provision of a radial flowfilter having inner and outer cylindrical pole pieces.

A further object of this invention is the provisions of elements in anarea of magnetic flux, for entrapment of ferro-magnetic particles.

' An additional object of this invention is the provision of a radialflow filter having a magnetic field of substantially Zero flux leakage.

Another object of this invention is the provision of a radial flowmagnetic filter incorporating a'center column of an alloy of magnesiumand aluminum which contacts the oil after being subjected to a series ofalternating magnetic forces, to react with the acids in oily solutions,rendering them harmless.

An additional object of this invention is the inclusion in a radial flowfilter, a center column of zinc, which contacts the water subjecting itto a series of alternating magnetic forces to retard rust formation, inan iron water system.

Still another object of this invention is the provision of a radial flowfilter having an annular area of flux in which there are a plurality ofmagnetized screens.

A particular object of this invention is the provision of a pair ofconcentric pole pieces providing an area of magnetic flux therebetweenand including in the flux area a multiplicity of N and S pole edges forattracting ferro-magnetic particles.

An additional object of this invention is the provision of a pluralityof alternating N and S edges in the path of the flow of the water tocause disturbance of electrons in their orbits to reduce the adheringcharacteristics of scale forming compounds.

Another object of this invention is the provisions of inner and outercylindrical pole pieces surrounding a core of aluminum-magnesium alloy.

An additional object of this invention is the provision of inner andouter cylindrical magnets surrounding an inner core of zinc.

A further object of this invention is the provision of radial flowmagnetic filter having inner and outer cylindrical pole pieces of mildsteel connected by radial spokes of highly permeable material.

These and other objects will appear in connection with the followingspecification taken with the accompanying drawings forming a partthereof.

In the drawings:

FIG. 1 is an elevation, partly in section, showing a form ofconstruction of my ring magnets;

FIG. 2 is a plan view partly in section of the magnet of FIG. 1;

FIG. 3 is a vertical section of a magnetic filter incorporating magnetssuch as in FIG. 1; and illustrates the center column core piece.

FIG. 4 is a plan view of the filter of FIG. 3;

FIG. 5 is a plan view of a modified form of the filter, and

FIG. 6 is a fragmentary perspective of an expanded metal filter screen.

Referring now to the drawings wherein like characters of referencerepresent like parts throughout the several views, the numeral 10indicates a ring magnet according to my invention. The magnet 10comprises an outer annular pole piece 12 spaced from an inner annularpole piece 14. Between the pole pieces 12 and 14, I arrange a pluralityof spokes 16 consisting of cylindrical permanent magnets \18, eachhaving a cylindrical shield 20. The magnets 18 are preferably slightlycountersunk into the pole piece 14, as at 22. A screw plug 24,preferably of paramagnetic material, is threaded into an opening 26 inthe pole piece 12.

In FIG. 3, I show in phantom section a portion of a filter housing 28having therein a filter 30 according to the present invention.

The filter 30 includes a plurality of superimposed spaced apart magnets10, each having an outer pole piece 12 and an inner pole piece 14.Between the inner pole pieces 14, there is a spacer element 32 which mayor may not be of paramagnetic material. The pole pieces 14 and thespacer 32 are preferably provided with mating rabbet and tongue portionsas at 34. The pole pieces 12 and 14 are preferably formed of mild steeland the magnets '18 may be formed of any suitable high permeabilitymaterial, but are preferably of the'type sold under the trade name,Alnico.

The construction of the magnets 10 having the bar magnet portions 18 andthe shields 20 is similar to the construction disclosed in my co-pendingapplication Serial No. 666,703, filed June 19, 1957. The powerfulmagnets 18 create an area of flux between the outer pole pieces 12 andthe inner pole pieces 14. Since the surface area of the annular pieces'12 is greater than that of the annular pieces 14, the concentration ofthe flux is toward the axes of the annuli and there is substantially noexternal flux leakage. With the magnets 18 polarized as shown the outerannuli are N poles and the inner annuli are S poles.

In the space between the pole pieces 12, 14 and the respective spokes16, I place an accordion pleated woven wire screen 36. Between the foldsof the screen 36, I place sheets 38 of expanded metal of the type shownin FIG. 6. The sheets 38 are arranged in radial planes parallel to theaxes of the pole pieces 12, 14 as can readily be seen in FIG. 4. Each ofthe sheets 38 provides a plurality of N and S edges as shown in FIG. 6.It is to be noted that in the sheets or magnets 38 having the N and Sedges as shown in FIG. 6, the distance between each of the pairs of Nand S poles is greater than the thickness of the material from which theexpanded sheet is formed. These magnets are formed of sheets of expandedmetal as illustrated in FIGS. 5 and 6 of my copending application SerialNumber 669,113, filed July 1, 1957, and the N and S pole arrangement isthe same as illustrated in said application. The above arrangement isalso illustrated in FIG. 5, herein, wherein the plates are in the fluxarea of the magnets 18 and are therefore magnetized by such magnets 18.The sheets 38 will be magnetized as shown in FIGS. 3 and 6, and thenumerous N and S edges will efiectively entrap any paramagneticparticles in a fluid passing through or between layers of screens.

The annular pole pieces 14 are provided with a plurality of radialopenings for the passage of fiuids to the interior of the filter. In theinterior core space of the pole pieces 14 and the spacer 32, I place aplurality of twisted liquid [for positive contact with preferably analloy of magnesium and aluminum for the purpose of counteracting theacidsina fluid, especially oil, flowing through the filter. l

Fluid enters the filter 30 through the gap 46 between the pole pieces 12and traverses the screens 36 and the plates 38 on its way through theopenings 40. The screens 36 will entrap small particles of material.Paramagnetic particles which may pass through the screens 36 will beentrapped by the multiplicity of N and S edges of the plates 38. Onreaching the bore 42 of the filter 30, the fluids encounter the ribbonsor twisted X bar 44. The action of the ribbons of magnmium-aluminumalloy renders the acids harmless.

In FIG. 5, I show a form of filter for water conditioning. Here thefilter 130 is generally similar to the filter 30 except that the screens36 are omitted. In the bore 142, I place the twisted ribbons or twistedX bar 144 of zinc. The rings 112, 114 and the spokes 1 16 and the sheets138 are like the corresponding parts in FIGS. 3 and 4. Fluid passingtransversely through the sheets 138 and through the openings 140 entersthe bore 142 and contacts the X bar 144. Galvanic action between thezinc X bar and the boiler or iron piping of the system causes thefilterrto become also a rust inhibitor. The passage of water past themultiplicity of N and S edges, disturbs the electron movement abouttheir nucleii and causes calcium carbonate particles to precipitaterather than to adhere to iron surfaces.

This invention is an improvement of the invention described in myco-pending application Serial No. 669,113, filed July 1, 1957, nowPatent No. 2,951,586, dated September 6, 1960, and entitled Means andMethod of Removing Paramagnetic Particles.

It is to be understood that though I have set forth spea cific examplesof my invention, changes may be made within the skill of the art and thescope of the appended claims.

I claim: 7 p

1. A radial flux magnetic filter comprising inner and outer annuli ofunlike polarity, said annuli enclosing an area subject to strongmagnetic flux, arranged in axially extending radial planes expandedmetal plates in said area, said plates being of paramagnetic material,said expanded metal providing a plurality of openings, and the offsetmetal between, the openings providing a multiplicity of N and S poles onopposite surfaces of said plates, 'for entrapment of ferro-magneticparticles, for positive contact with the fluid passing therethrougha 2.The structure according to claim 1, wherein the annuli areinterconnected by a plurality of radial spokes, each spoke including ashielded bar magnet.

3. The structure according to claim 1, wherein the inner annulus isprovided with a plurality of radial openings.

4. The structure accordingto claim 3 wherein a core space is providedwithin the inner annulus and wherein an X bar of non-ferrous metal, isplaced in such space.

5. The structure according to claim 4, wherein the non ferrous metal isan alloy of aluminum and magnesium.

6. The structure according to claim 4, wherein the non-ferrous metal iszinc.

References Cited in the file of this patent UNITED STATES PATENTS

